-82.53% is the change from 939 to 164
Calculation steps:
[( 164 - 939 ) ÷ 939] x 100 = -82.53%
Formula
Percentage change = [(164 - 939) / 939] x 100
Subtract the new number by the original number
164 - 939 = -775
-775 ÷ 939 = -0.825346112886049
-0.825346112886049 x 100 = -82.53%